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Tim Boyle/Getty Images(SYDNEY) -- Thieves Down Under might get a little something extra the next time they rob a McDonald’s.

In an effort to crack down on robberies at McDonald’s in Sydney, the company has hired SelectaDNA, a British security firm, to install a system that sprays a solution on would-be thieves on their way out the door of the fast-food outlets that can later be used to identify the culprits.

A handful of McDonald’s locations have been hit in the past few weeks by thieves who snatch more than just a Big Mac. Now the company hopes the newly installed systems will deter robbers from stealing from the Golden Arches.

“A spokesperson for McDonald’s said the company will increase the use of SelectaDNA in stores all over the country after a successful trial in their six busiest Sydney restaurants was launched in January last year,” The Sydney Morning Herald reported. "The move comes as police ramp up their patrols of local McDonald’s restaurants after a spate of robberies across Sydney during the Christmas and New Year period.”

The Intruder Spray solution was introduced in 2008 and “contains a UV tracer and a unique DNA code, linking them irrefutably to the crime scene,” according to SelectaDNA’s website.

Once triggered by a thief, the spray will fall onto intruders as they enter a business or home. It can be synced to a panic-button or to any alarm system within a business or home. The solution is both harmless and too small to be seen but will stay on an intruder for weeks, “clinging to fibers and sitting in the creases of the skin,” according to the website.

With the installation of this high-technology security system, SelectaDNA says it will cut theft and burglaries significantly.